Geoege blackbubn



(No Model.) A

G. BLACKBURN.

SMOKE GONSUMING FURNACE. N0w277,9-78. Patented May 22,1883.

W1 TNESSES: [Ni ENTOR pipe T.

.UNITED STATES.

PATENT QFFICE;

GEORGE'BLACKBURN, OF COLUMBUS, OHIO, ASSIGNOR TO THE STANDARD BOILER ANDSMOKE OONSUMING FURNACE COMPANY, OF SAME PLACE.

SMOKE-CONSUMING FURNACE.

SPECIFICATION forming part of Letters Patent No. 277,978, dated May 22,1883.

Application filed November 28, 1882. (No model.)

To all whom it may concern Be it known that 1, GEORGE BLACKBURN, ofColumbus, Franklin county, Ohio, have invented certain new and usefulImprovements 5 in Smoke-Consuming Devices, of which the following is aspecification.

Thisinvention pertains to smoke-consuming devices for application tofurnaces used in connection with steam-engines; and it consists of anarrangement of pipes for conveying the exhaust-steam from thesteam-engine through a superheater to the furnace, and of a peculiararrangement of the furnace-walls, all as here inafter set forth.

[5 In the accompanying drawings, Figure 1 is a vertical longitudinalsection of a boiler-furnace embodying my improvements, and Fig.

2 isa vertical transverse section of the same.

In the drawings, A represents llIQbOllGI;

B, the boiler-flues; O, the breeching; D, the

smoke-stack; E, the ashpit; F, the grate; G,

the fire-place; H, the bridge-wall; I, the firedoor; J, the ash-pitdoor; K, the tail-wall; L,

the flue-plate; M, the tail-wall door; S, the steam engine; and T, theengines exhaustpipe, all constructed and arranged substantially asusual.

N isa wall under the tail end of the boiler;

O, a flue or opening through the base of wall Q, a flue or space betweenthe top of wall P and the bottom of the boiler; R, a superheating-pipebuilt in the top of the bridge-wall; U, a pipe from exhaust-pipe T tothe superheater R V V, pipes from snperheater R to front of fire-placeG, above the fire; W, jet-holes in front ends of pipes V, issuing overthe fire; and X, a valve in exhaust-pipe T, above the point where pipe Uconnects with the exhaust- In operation the valve X is slightly closed,

N; P, a Wall under tail of boiler, near wall N;"

- so as to produce a slight reactive pressure in thecxhaust-pipe. Thisslight pressure, reacting on the steam-pressure, will produce no seriousdamaging efi'ect on the engine-power. 5

By reason of this slight pressure part of the exhaust-steam passes tothe superheater,where it becomes superheated, or at least has itstemperature somewhat raised. The steam leaves the superheater by thepipes V, and jets out 0 over the fire in front and joins the products ofcombustion. The mingled gases pass over the bridge-wall and impingeagainst the current-breaking Wall P and become retained a time in thechamber in front of that wall, the 5 from the impingement of thehotgases on their turn upward to the boiler-flues. The steam-pipes arebest when built within the brick-work to protect them from burning; butthey may be exposed direct to the action of the' tire or hot gases, andthe location of the pipes may be. changed without departing from thespirit of the invention.

I claim as my invention 1. The combination of engine S, exhaustpipe T,valve X, boiler A, furnace G, superheater R, jetted pipes V, p'ipe U,bridge-wall H, walls P, N, and K, and flues or openings Q and O,substantially as set forth.

2. The combination, in a boiler-furnace, of Wall P, having opening Q,and wall N, having openings 0 and c and doors d, substantially as setforth.

' GEO. BLACKBURN.

Witnesses S. L. REEVES, A. H. GoonwrN.

